Presjs-roll mechanism



No. 752,633. PATENTED FEB. 16, 1904. W. M. WILKIN.

PRESS ROLL MECHANISM. APPLICATION FILED APR. 18, 1903.

N0 MODEL.

2 SHEETS SHEET 1.

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NOR/52, 33 PATENTED PER-1s, 1904.

W. M; WILKIN. PRESS ROLL MECHANISM. APPLICATION .PILEDAPR. 18, 1903.

10 MODEL. 2 SHEETS-SHEET 2.

Wit- E5595 UNITED STATES Patented February 16, 1904.

PATENT OFFICE.

" (WILLIAM M. WILKIN, OF MOBILE, ALABAMA.

PRESQS-ROLL MECHANISM.

SPECIFICATION forming part or Letters Patent No. 752,633, dated. February 16, 1904. A u i fi1 d Aprill8, 1903. Serial No. 153,237. -(No model.) i

To all whmn it may-concern:

l Beit known that I, WILLIAM M. WILKIN,

a citizen ofthe United States, residing at-Mo bile, in the county of Mobile and State of Alabama, have invented certain new and useful Improvements in Press-Roll Mechanism for Gang-Saw Mills; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable others skilled in the art to which itappertains to makeand use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification. r l i This invention relates to press-roll mechanismxfor gang-saw mills, and relates particularly to the improvements inpressrollguide mechanism and means for operating the pressroll mechanism embodied in my pendingapplicationfor Letters Patent for gang-saw mills, filed May 6, 1902, SerialNo. 106,152.

I H-eretofore screw mechanism has been ordinarily utilized for operatingthe press-roll mechanism of gangsaw mills; but the'unyielding'nature of the-screw mechanism is a serious objection to such means for operating press-roll mechanism. I am also aware that to overcome this difficulty gang saw-mill press-roll mechanism has been attempted to be operated bymeans of steam or compressed-air cylinders placed on'the top of-the mill-frame and connected with the center of the pressroll. yokes. This latter construction, however, so largely increased the height and weight of the upper part of" the structure that the: vibration thereof induced by the rapidlyreciprocating saw-sash is so destructive to' the structure as to render its use impracticable.

A further objection to its practical operation.

was the fact that the operating mechanism was connected to the center of the press-roll yoke, which permitted the yoke to so tilt in its guides as to materially interfere with its successful operation, and while a practical means for operating press-roll mechanism with steam or compressed-air cylinders has been generally desired, yet heretofore no mechanism has been devised therefor which has proved successful and practical in operation. To overcome these and other difficulties in and theyoke swung around and back upon the other guide from in'front of the saw-sash, and for operating the press-roll yoke I mount steam or compressed-air cylinders at the side of the mill-frame, near the base thereof, and connect the pistons thereof with arms on rock-shafts mounted in the lower part of the mill-frame, and from arms on the rock-shafts at the sides of the mill-frame links extend up to and are removably securedto the ends of thepress-roll yokes, so that they can be detached therefrom when it is desired to swing the press-roll yokes back from in front of the saw-sash. These and other features of my invention are hereinafter fully set forth and explained, and illustrated in the accompanying drawings, in which Figure 1is aview in elevation of a gangsaw-mill frame," showing a press-roll mechanism embodying my invention. Fig.2 is a vertical section of the same on the line a: min Fig. 1 looking in the. direction of the arrow. In the drawings illustrating my invention, A A are the sides, and A! the base, of a gangsaw-Inill frame, and B B are the feed-rolls mounted 'in said frame and driven by the usual feed-roll mechanism. (Not shown.) ()n the edges of the upper part of the sidesA A of the frame there are guide-yokes .C, having eyes 0 c at the ends thereof, through which vertical: guide rods D are inserted. These guide-rods D are preferably round, and upon these guide-rods- D, Ifmount the press roll yok es E, whichare provided with sleeves eje on the ends thereof, whichembrace and slide compressed-air cylinders G Gr, with the usual pistons therein, connected with piston-rods g g, extending upward therefrom. In the sides A A of the frame and below the feed rolls therein I mount rock-shafts H H, and from arms h on said rock-shafts links 9 extend to and connect with the piston-rods g, and on the ends of the rock-shafts H, I secure arms it h, which I preferably construct of sleeves H, secured to the shaft H, in which the arms it slide longitudinally, and to the arms It I pivot links J J, which extend upward to and pivot upon studs 6 6 extending outwardly from the press-roll bearings e e on the pressroll yoke E, and for retaining the links J J on the studs 6 e I provide removable pins 6 6 which extend downward through the lower edge of the press-roll yoke E, which pins 8 can, however, readily be removed and the links J detached from the studs 6 when desired.

For adjusting the arms h in the sleeves H, I provide rock-shafts LL, having arms L L thereon, from which links Zextend to and are pivoted to the links J, adjacent to their pivotal connection with the arms h, and for operating the rock-shafts L L, I secure operating-levers K upon the ends of the rock-shafts L L at the side of one of the side frames A by means whereof the length of the arms 71 it can be adjusted to vary the pressure exerted on the press-roll yoke E by the cylinders Gr through the piston-rods g, the links and the rock-shafts H, as may be desired.

From the description of the mechanism and its operation hereinbefore given it is believed that the operation thereof is I so obvious that further description thereof is deemed unnecessary. I have herein shown and described the arms h on the shaft H as adjustable, and while I prefer this construction it is perfectly obvious that they would operate practically and successfully if they were made without adjustment. It will also be observed that by means of the mechanism herein described I am enabled to operate each press-roll yoke independently of the other, which is a desirable feature in press-roll mechanism.

Having describedmy invention so as to enable others to construct and use the same, what I'claim as new, and desire to secure by Letters Patent of the United States, is

1. In press-roll mechanism for gang-saw mills, a mill-frame, removable press roll yokeguides on said mill-frame, a press-roll yoke mounted on said guides so as to move freely up and down thereon, and capable of being swung around on one of said guides when the other guide is removed, substantially as and for the purpose set forth.

2. In a press-roll mechanism for gang-saw mills, amill-frame, removable press-roll yokeguides mounted in ears on said mill-frame, a press-roll yoke mounted on said guides, rockshaft mechanism mounted on the lower part of the mill-frame, links connecting the ends of the press-roll yoke with said rock-shaft mechthe mill-frame near the base thereof, pistonrods extending upward therefrom, rock-shafts mounted in the mill-frame below the plane of the feed-rolls of the mill, arms on said rockshafts, links connecting said piston rods with said arms, arms on the ends of said rock-shafts, and links connecting said arms with studs at the ends of the pressure-roll yoke, substantially as set forth.

4. In a press-roll mechanism for gang-saw mills, a mill-frame, guides thereon, steam or compressed-air cylinders mounted at one side of the lower part of the mill-frame, rockshafts mounted in the mill-frame below the plane of the feed-rolls of the mill, arms on said rock-shafts, links connecting said arms with the piston-rods of said cylinders, adjustable arms on the ends of said rock-shafts, links connecting said adjustable arms with studs at the ends of the press roll yoke, mechanism for controlling said adjustable arms, substantially as set forth.

5. In a press-roll mechanism for gang-saw mills, a mill-frame, ears on the edges thereof, vertically-removable guides mounted in said ears, press-roll yokes mounted on said guides, vertical steam or compressed aair cylinders mounted at one side of the mill-frame near the base thereof, piston-rods extending upward from said cylinders, rock-shafts mounted in said mill-frame below the plane of the feedrolls therein, arms on said rock shafts, links connecting said piston-rods with said arms, adjustable arms on the ends of said rock-shafts, links connecting said adjustable arms with studs at the ends of the press-roll yoke, means for detachably securing said links upon said studs, and rock-shaft, link-and-lever mechanism for adjusting and controlling said adjustable arms, substantially as set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

' WILLIAM M. WILKIN.

Witnesses:

W. R. WILKIN, WM. H. ARMBRECHT. 

